Stop losing money to bad addresses
Every undeliverable package costs you twice: once for the shipping you already paid, and again for the customer service call that follows. The USPS Office of Inspector General puts the cost of undeliverable-as-addressed mail at roughly $20 billion a year across the mailing industry, with about 35% of it traced back to businesses working from incorrect address data.
Address Validation catches those errors at the point of entry, which is the only place they are cheap to fix.
What it does
Real-time USPS verification inside your existing Gravity Forms address fields. Customers start typing and see verified suggestions with correct ZIP+4 codes, standardised formatting, and validated apartment numbers. The address is checked against the official USPS database before the form is submitted.
Key features
USPS verification. Every address is validated against the official USPS database in real time, so you know it is deliverable before you ship.
Address autocomplete. Customers pick their address from a dropdown as they type rather than entering it in full, which means fewer typos and fewer abandoned forms.
ZIP+4 codes. Precise postal routing, and eligibility for USPS bulk mailing discounts that require ZIP+4 accuracy.
Apartment validation. Detects when a unit number is required and prompts the customer to supply it, so packages do not end up stuck in a lobby.
Who it is for
E-commerce stores shipping physical goods, service businesses that need accurate customer locations, subscription boxes, event organisers mailing tickets and materials, and any business where a wrong address costs real money.
Setup
Around two minutes. It enhances existing Gravity Forms address fields automatically, with no form changes and no code.
Requirements
Address Validation is powered by the Smarty address APIs, which is what gives it USPS-grade accuracy rather than a best-guess match. You will need a Smarty account, which starts with a 42-day free trial before a paid plan is needed.
It uses two Smarty APIs: US Street Address for validation, and US Autocomplete Pro for the type-ahead suggestions. Each is a separate subscription. With only the Street API the plugin still validates every address, and customers type them manually rather than picking from suggestions.
Current pricing is at https://www.smarty.com/pricing
US addresses only.